New macrobicyclic triphosphazides and triphosphazenes formed by self-assembly of tripodal triazides with triphosphanes
作者:Mateo Alajarín、Carmen López-Leonardo、José Berná
DOI:10.1016/j.tet.2006.04.056
日期:2006.6
The self-assembly of tris(3-azidobenzyl)amines with 1,1,1-tris[(diphenylphosphino)methyl]ethane via tripod–tripod coupling proceeds successfully to give chiral macrobicyclic triphosphazides. The heating of these macrobicyclic cages induces a remarkable stepwise triple extrusion of molecular nitrogen to afford tri-λ5-phosphazenes, which preserved the chiral, propeller-like topology of their precursors
三(3-叠氮基苄基)胺与1,1,1-三[[(二苯基膦基)甲基]乙烷经三脚架-三脚架偶合的自组装成功进行,得到了手性大环双环三叠氮化物。这些macrobicyclic笼诱导的加热分子氮的一个显着的阶梯式三重挤压,得到三λ 5个-phosphazenes,它保留它们的前体的手性,螺旋桨状的拓扑结构。用邻苯乙基或亚丙基取代一个苄基臂仍使自组装成功。然而,以N-氧化物形式的三胺的枢转氮原子的季铵化阻止了其与三膦的偶联。